<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.7.16/dist/vue.js"></script>
    <link href="./CSS/demo1.css" rel="stylesheet">
</head>
<body>
<div id="root">
    <div id="wrap">
        <div>
            <div class="colBox col_1"></div>
        </div>
        <div>
            <div class="colBox col_2"></div>
        </div>
        <div>
            <div class="colBox col_3"></div>
        </div>
        <div>
            <div class="colBox col_4"></div>
        </div>
    </div>
</div>

<script src="./js/demo1.js"></script>

</body>
</html>